module Aio::Module

	class	Ranking
		attr_reader :ranking
	end

	class Ranking_1 < Ranking
		def self.to_s; "level-1"; end
	end
	class Ranking_2 < Ranking
		def self.to_s; "level-2"; end
	end
	class Ranking_3 < Ranking
		def self.to_s; "level-3"; end
	end
	class Ranking_4 < Ranking
		def self.to_s; "level-4"; end
	end
	class Ranking_5 < Ranking
		def self.to_s; "level-5"; end
	end

end
	
